Finding the Fourth Proportional to 77,123.55, 106,399.11 and 50,256.25

Step by Step Solution

1. Step 1: Write the proportion equation
   77,123.55 : 106,399.11 = 50,256.25 : x
2. Step 2: Convert to fraction form
   77,123.55/106,399.11 = 50,256.25/x
3. Step 3: Cross multiply
   77,123.55x = 106,399.11 × 50,256.25
4. Step 4: Simplify right side
   77,123.55x = 5,347,220,271.94
5. Step 5: Solve for x
   x = 5,347,220,271.94/77,123.55
6. Step 6: Final answer
   x = 69,333.17